Type-writing machine.



A. I. BRIGGS. TYPE WRITING MAGHINB. Y APPLICATION FILED 00T.12, 1908.

Patented Dec. 21,1999.

A TTORNE Y.

A. J. BRIGGS. TYPE WRITING MACHINE. APPLIOATION FILED 0T.12,.1908.

Patented Dec. 21, 1.909.

mm. qm @n I/V/TNESSES: 5 M 7%,664/

ATTRNEY.

UNITED sTATEs;

ARTHUR J. sarees, or sYaAcUsE, NEW` YORK, AssIGNoa To THE SMITH PREMIERTYPEWRITER COMPANY, or sYRAcUsE, NEW YORK, A coEroRATIoN oF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Dec. 21, '1909.

vApplication filed October 12, 1908. Serial No. l157,401. f

y is a specification.

l, My invention nrelates to typewriting machines and particularly ltothe line lock and margin-stop mechanism of such machines.

In line locks as heretofore constructed the carriage, When the Send ofthe line is reached, engages a stop which arrests-said carriage andwhich throws into operation adevice foi-'locking the printing keys.IVith mechanism of'this character .it sometimes happens that thecarriage is arrested but the locking device fails to operateimmediately,

with the result thatv one letter is written on top of another. Moreover,whenthe second letter is writ-ten, the escapement is operated, butl thecarriage having vbeen arrested, it doesliot move a complete letterspace.- The result-is' that when the carriage is released after beingdrawn back to begin a newline,

it moves one letter vspace distance, thus causing the new line to beginonespace in advance lof the margin and -causing the lefthand margin tobeirregular.

It is one oft-he principal present invention to obviate thesediliiculties.l

My invention also has for its object the improvement of the line lockingand margin stop devices in vsome other respects Whlch will appearhereinafter.

To the above and other ends my inven-y tion' consists 1n certam featuresof construction, and combinations andA arrangements ,of parts allof'whicliwill'be fully Aset `forth herein and particularly pointedout-.inthe claims.

In the accompanyingI drawings, Figureil is a front to rear-verticalsectional view of a typewritingmachine, 4the main frame being shown insection'about on the line :c+-:vof Fig. 4, but parts'being shown incentral sec? tion. 2 is a sectional view .taken about on line 1y-y ofFig, 4 and showing the linelock in roperated position.' Fig.'3 is afragmentary sectionalview vof 'part of the mechanism taken centrallythrough thefstationary stop and showing said stationarys'top withdrawnout of the path ofthe 'coperating obj ectsof -the devices on thecarriage. Fig. 4 isa rear elevation of the machine .with parts omitted,parts in section and parts broken away. Fig. 5 is a fragmentary top planview of parts of the mechanism. F 1g'. 6 is a view, partly in section,showing the bell ringer. Fig. 7 is a fragmentary front elevation showinga bar that is mounted on the car-- raige and that carries part of theline lock and margin stop mechanism. p

For the purpose of lllustralon I have' shown my mvention embodied 1n afront-f strike machine known as the Smith Premier No. 10 typewriter. Themain frame of thisl machine comprises side plates 1, having cor# nerposts 2 which support a top plate 3. Said side plates are connectedtogether at the rear by a back base plate 4 and at the front by akeyboard plate which is bent down to form a front plate 6. A cylindricalplaten 7 is mounted on a carriage 8 which is mounted by means of ballbearings on a stationary rail 9 4,supported by standards 10 rising fromthe top plate 3. The carriage is propelled in letter space direction bya spring drum and certain gearing which are not shown herein but whichare shown and described in an application of Alexander T. Brown filedDecember 10,1906, Serial No. 347 ,104. The I carriage is controlled inits step by step motion by means of an escapement comprising a tooth 12mounted on the upper end of a shaft 13 that is geared to the carriage,said shaft being journaled in a bracket 14. A light universahbar 15normally stands in front of the platen and said universal bar forms-partof a frame that is pivoted at 1G to the bracket 1 4. Said frame alsocomprises a pair of feed dogs 17 which control the tooth 12. Thisescapement and carriage feed mechanism is more fully described and isclaimed in theap lication of Alexander'. T.

- '.Brown, above re erred to.` The universal bar-15 is operated by beingstruck by type bars .18 which are arranged for a front-strike ontheplaten, said .type bars being mounted on segments20 and 21 by ballbearings. The type bars are operated by radially disposed ylinks 22pivoted to the heels of said type bars and at their outer ends pivotedat 23 to radially disposed sub-levers 24 which are plvyoted on a' pivotwire 25 laid in apsub-lever segment 26. The sub-levers 24 are operatedvby links 27 that extend toward the front of the machine and areconnected at their forward ends to bell crank key levers 28 which areoperated by the stems-29 of thev printing keys 30. The construction issuch that when one of said printing keys is depressed the vcorrespondinglink 27 is drawn toward the front of the machine, rocking the sub-lever-24 toward the front of the machine and throwing the type bar toprinting positin, the type bar in the last part of its motion ,10striking the universal bar and operating the escapement. Each of thesub-levers 24 is provided with a returning spring] 31 and .each of saidsub-levers has an outwardly extending arm 32 that is adapted to operatea 15 universal bar 33. This universal bar consists of a segment made ofangled metal and supported near'its ends by arms 34 which project upwardfrom a rockshaft 35 and which at their up er ends are pivoted to ears 36projecting rom thje iipiversal bar 33. Said universal bar is controllednear its middle by an arm 37 rising from a rock shaft 38 and pivoted atits upper end to a bracket 39 projecting from said universal bar.

link 40 connects an arm 41 of the rock shaft 35 with -an arm 42 of therock shaft 38 and compels these two rock shafts to move to- .gether insuch a way that alllparts of the universal bar 33 have the Vsame motionltoward the rear of the machine when a key is operated. Said universalbar is restored to normal position by a springv 43 connected with thearm 42.

. In the `Smith Premier No. 10' machine the universal bar 33 is utilizedlto 'operate a ribbon vibrator, which vibrator,l however, is not shownin the presentcase; and it is this-universal bar 33 thatiis locked whenthe carriage reaches the end of a line, lfrom 40 which it will be seenthat the line lock'dos not affect the escapement.

The line lock devices comprise a link which at its lower end is pivotedto the arm 41 and at its upper end is formed with an n 45 elongated slot46 through which there passes loosely a headed screw 47 whichx isthreaded- Ainto the rearl leftfhand post 2. The screw 47 and slot 46.serve to guide the upper end of the link 45 but permit it to movedownward when the universal bar 33 is operated. The margin stop and linelock devices on the carriage comprise a toothed bar 48 which issupported by arms 49 depending from the carriage behind the rail 9. Asshown in Fig.- 7 this bar is toothed on its upper edge and carries amarginstop piece 51 and a line lock piece 52. Each of these pieces hasears 53 bent over the top and under the bottomA edge of the bar49'and'serving vto retain said pieces 51and 52 on the bar butwithfreedom to slide lengthwise of the bar. These pieces are retained in anyposition 'along tlesbarfatc ies 54 to which they may be adjusted bypivoted-at 55 and controlled'by springs 56, es the free ends of thelatches engaging 1n the and pivoted art-.84 to the front plate 6./ Thenotches of the bar 49,which notches are spaced a letter space distanceapart.I Themargin stop piece 51 has projecting toward the front of themachine ther; rom a lug 57 having its right-hand face'58 abrupt and itsleft- 70, hand face 59 inclined. This lug 5-7 coperates with astationary stov 61 which is mounted on a bar 62 that hes beneath therail 9 and is supported at its ends by the standards 10. f

The stop 61fconsists of a part of a plate or block 63 which is mountedon the bar62 with freedom to slide in a fore-and-aft di' rection. Saidplate 63 lies ontop of the bar 62, but vthe part 61 is depressed into aslet 80 formed between two ears 64 on the bar 62. The plate y'63 is heldagainst detachment by means of a shouldered and headed screw 65 threadedinto the bar 62, and passing, through a slot 66 in the plate 63. At itsg5 forward end 'the plate 63 has a hole therethrough, through whichpasses the upper end of anl arm 67 that is bent olf from a rock shaft68, the upperF end of the arm passing through a slot 69 formed between90 ears of the bar 62. The whole construction is such as to guide theplate 63 and stop 61 in their fore-'and-aft motion, buty to preventmotion of said parts laterally of the Inachine. The rock Shaft 68ispivoted'in a 95 bracket 71 secured to the under side of the top plate3, and the arm 67 passes upward through a suitable opening in ythe topplate.

4At its right-hand end t-he`shaft'68` has a forwardly projecting arm 72to which is pivoted a link 73 by, a pin and slot connection 74. Thelower end of the link 73 is pivoted to an arm 75 projecting from a rockshaft 76 that is journaledat its rear' end in the back plate 4 and atits forward end in the front plate 6. Said rock shaft is controlled byareturning spring 7 7 thevtension of which is exerted to hold the link73 in its normal upper position. *,At forward end the rock shaft 76 has`an arm 80 projecting therefrom to which arm is pivoted the lower endofthe stem 81 .lock release key 82. The stem 81 is also controlled by aguide link83 parallel to the arm 80 11s construction is such that, iftheV key 82 be de- 'pressed the rock shaft68 will befrocked to movethejarm 67- and sto 61 ltoward the the path of the front of the machineout o margin stop 57, as shown in Fig. 3.

spring 7 8, coiled about the shaft 68, is connected tosaid shaft fornormally holding 'the stop 6-1 in its rear position.

.When the carriage ,is drawn" toward the right, it is' arrested by. theabrupt face 58 of the-margin stop 57 contacting with the desired to.write in the' margi'n','this 'may be done by depressing the key .82.andtwithdrawing the' sto 51 out of the path ofthe stop 67. When t ecarriage of the margin and line" moves toward the left out of itsmarginal position the inclined face 59 of` the stop 5 7 will cam thestop 61 toward the front ofthe machine without obstructing the motion ofthe carriage. y

For the purpose ofv ringing the bell and of locking the printinginstrumentalities at the end of a line the bar 62 is pivoted at itsends. Each end of said bar is formed lwith a trunnion which trunnionsAenter suitable axial bearings formed in screws 90 threaded through thebrackets 10 so that the bar is free to rock in either direction butcannot move endwise. The positionof the stop 61 maybe adjusted by meansof these screws 90. The bar 62 is controlled by a fiat topped puppet orplunger 91 which is pressed upward against the fiat underside of the bar(32 by a spring 92. ASaid puppet 91 lis seated in a suitable tube orsocket piece 93 secured to the top 'plate 3 and the spring92 is seatedin the puppet 91, which is made hollow for the purpose. If the bar 62 berocked in either direction,` it will depress the puppet against thetension ofthe spring 92 and said .spring will restore the bar 62 to itsnormal position when said bar is released. ln order to ring the bell`the piece 52 has formed on its forward side a. projection or lug 94having its left-hand upper corner beveled olf as shown at 95, said bevelterminating in a flat upper surface 96. When the carriage approaches theend of a line the bevel 95 rides under the stop Gland cams said stopupward, thus rocking the bar 62 toward the front of the machine. The baris retained in this rocked position until the stop 61 drops off of theright-hand end of the flatpart 96. Said bar 62 has an arm 97 dependingtherefrom near yits right-hand end and said arm is adapted to contactWith the arm 98 of the bell clapper 99 which is adapted to strike thebell 100, which is mounted onone of the corner posts 2. The arm 98 ofthe bell clapper constitutes parts of a yoke shaped frame which ispivoted on a pin or screw 101 projecting from the post 2. Saidyoke-frame has an elastic arm 102 that normally contacts with theunderside of the top plate 3 and holds the clapper slightly out ofcontact with the bell. When the bar 62 is rocked in the manner abovedescribed by the lug 94 the arm 97 raises the bell clapper, moving theparts to the dotted line position of Fig. 6,and whenthe stop 61 escapesfrom the lug 94 and the parts drop back to normal position the clapperstrikes the bell, slightly bending the arm 102. The right-ha11d part 94of the lug 94, is beveled so that, when thc carriage is moved toward theright, this bevel' ca`ms the stop 461 forward which permits the lug 94to pass said stop.

pending from the bar 62 near thel 1efthand The line lock comprises anarm 103, de#

end thereof., seid arm 103 projecting downward through a suitableopening in the top plate and having a hook 104 formed on its lower endand projecting to the rear of the link 45, which as has been explained,is connested with the universal bar 33. Said link 45 at its upper end isformed with a rearward extending hook 105. The -construction is suchthat if the bar 62 be rocked by depressing rthe stop 61 the arm^103 willbe rocked toward the front of the machine, throwing the hook 104 underthe hook 105 and locking the link 45 against operation, with the resultthat 4the universal bar 33 is also locked against operation. The bar 62is rockedl to operate the line lock by means of a roller 106 journaledon the"forward face of the piece 52 and having its center a little abovethe upper surface of the stop 61 so that when, inthe motion of thecarriage toward the left, said roller engages said stop, it willdepressl the stop and rock the bar 62 in a direction the opposite ofthat in which it is rocked by the lug 94. It will be seen that the bellis operated by rocking the bar 62 in one direction and that the linelock is operated by rocking said bar in the opposite direction; and itWill also be seen that the 'roller 106 does not act as a stop to arrestthe m'otion of the carriage.l In casethe keys are 'being operated veryrapidly it may happen that When the hook 104 is irst moved forward bythe devices that have been described, the link 45 will already be in adepressed position so that said hook will not be able to move forwardunder the hook 105. If the carriage were arrested by the roller 10.6this would resultl in one letter being written on another but with thepresent construction no such effect will be produced as the escapementwill be operated and the carriage will step as usual until the link 45does return to normal position when thel hook 104 will snap in under thehook 105 and lock the keys. 1

It Will be perceived that it is advantageous to have'the arm 103connected with the bar 62 by a yielding connection so that said bar 62may be rockedby the motion of the carriage, even though the arm 103cannot move forward at that moment under the hook 105. To this end thearm 103 is not rigidly mounted-on the bar 62 but said arm at its upperend is bent over the top of the bar 62, the device comprising ahorizontally disposed branch 107 of the arm 103. vA screw 108 passesupward-loosely through a suit? able hole in the bar 62 and is threadedinto the part 107, and a spring 109 is coiled about said screw beneaththe bar 62 and is compressed between'said bar and the head ofthe screw.T he construction is such that this spring normally lholds the part107-pressed down flat against the upper surface of the bar 62 but saidpart 107 and the arin 103,

fao

may be rocked on the bar 62 by slightly compressing the spring 109. Thepart 107 is add'tionally/guided' by a screw 110 which passes looselythrough an opening in the part 107 and is threaded into the'bar 62. If

the bar 62 is rocked at a time when the link 42 is in a depressedposition the arm 103 moves forward until the hook 104 presses againstthe rear tace ofthe hook 105, the bar 62 continuing to rock against thetension of the spring 109. When the link 45 returns to normal positionthe hook 104 is snapped in under the hook 105 by said spring 109.

The construction of the line lock mechanism so that it does not act as astop to ar' restthe canriage, has an important result in preyentingirregularity in the left-hand margin otthewriting. If the carriage werebrought to rest by coming againsta stopand the linelock did not comeinto play immediately, as often happens in rapid operation, theescapement tooth 12 would be released from the dogs 17 by the operationofthe type bars but said tooth would not make a rotation on account ofthe fact that the carriage was arrested by the stop. The result wouldbethat when the carriage'was drawn back to begin a new line the tooth12, whichv corresponds to an ordinary escapement wheel, would havealready begun a rotation and this rotation would be completed when thecarriage was restored to the control` of the escapement at the beginningof the line. The carriage would thus step one space be'- fore the firstletter of the line was written and this particularl line would begin oneletter space distance to 'the right of the general margin -of the page.This trouble, which is present in typewriters generallyas at presentconstructed, is obviated by dispensing with the stop. It the line lockdoes not come into play at the {irst key stroke after the stop 61 iscammed down by the roller 57, the carriage, nevertheless, continues tospace until said lock does come into play and any operation of theescapement will be completed.. When the present line lock is employedtherefore the left-hand margin ot' the writing is made uniform. If, whenthe line lock is operated, it be desired to write a few more letters tocomplete a Word or syllable, the line lock may be `released bydepressing the key 82, thus withdrawing -the stop 61 from the roller 106and 2 permitting the spring plunger 91 to rock the bar 62 back to normalposition.

Various changes may be made without de :parting from my invention.

VvVlhat I cla-11n as new and desire to secure by Letters Patent, isz- 1. In a typewriting machine, the combination of acarriage, escapementmechanism for controlling said carriage, a universal bar for saidescapement mechanism, a separate universal har, line lock mechanism forlockstrumentalities,

ing said 'separate universal bar without'at fecting the irst nameduniversal bar, and means on the carriage for operating said lockingmechanism, said means not being adapted to arrest the carriage.

2. In a typewriting machine,

the combination of a carriage, printing instrumentalities, a universal'.bar for said printing ina lock for -said universal bar, means moved bythe carriageat the endv of 'a line for operating said lock, said meansnot being adapted for arresting the carriage, anda spring connectionbetween said means and said locking device to enable said means to beoperated when the uni versal banis out of normal position.

3. Ina typewriting machine, the combination of a carriage, a cam mountedon said carriage, a rocking bar mounted onthe main frame and adapted tobe rocked by said g5 cam, a line lock operated by such rocking oi' saidbar, and a yielding connection between said line lock and saidbar toenable said bar to be operated in case a key is inde, j pressed positionwhensaid bar is operated.

4. In a typewriting machine, the combi,- nation of a margin stop, acoperating stop,

a rocking bar on which said cooperating stop is slidably mounted, a keyin the key'- board of the machine, and means operated by said key forsliding said stop on said rocking bar out of the path of said marginstop.

5. In a typewriting machine,the combination of aline lock ydevice 103, arocking device 62 on which. said device 103 is mounted, a screw or pin'108 in one of said devices, and aspring '109'acting on said pin` orscrew and normally maintaining said devices in fixed relation. f

f 6. In a typewriting machine, thecombination of a margin stop 61, arocking support on which said stop is slidably mounted,

an arm passing through saidstop in such a manner as not to interferewith the-rocking 11o of said support, and a release key connectedf. withsaid arm. l j` 7. In a typewriting machine, the combi?? nat-ion of acarriage, an operating device 94 mounted on said carriage, a coperatingde- 115 vice 61 and a bell ringer operated b said device 61, said device94 being beve ed in two directions, one bevel moving the device 61 inone direction to ring the bell and the other bevel moving the device 61in another 120 direction at right angles to the first onthe return ofthe carriage,`to permit said device 94 to pass said device 61.

8. In a typewriting machine, the combination of .a carriage, printingkeys, a part 125 that is movedl at each operation of a printing key,` arocking bar, means for rocking said bar at the end of a line ofwriting,a hook operated by the rockingof' said bar and adaptedto engage saidmovable part to 13e Y prevent the operation of the printing keys,

position.

and @spring connection between said rock- 'ing bar and said hook, saidspring being placed under tension by the rocking of seid bar when saidmovable part is outo normal 9. In a typewriiing machine, the combinationoi a carriage, printing keys, a. nni-v l ing sind bar at the'en. 'of e-iine of Writing, and a hook mounted on said rocking bar and adapted tovengage said link to lock said universal bnr..

Signed at Syracuse, in the county of Onondaga, and State' of NewYork,'this 8th dey. of Oct., A. D. 1908.v

ARTHUR J. BRIGGS.

Witnesses E. E. Coni', H. I. SnDDoN.

